The article is devoted to the use of stiffness matrices of joint connections when analyzing trusses of railway bridges. When performing calculations by the finite-element method, implemented in such a software package as Ansys Mechanical, an important issue is the required performance of computing equipment. To obtain accurate results on the stress-strain state of structures and their individual elements, it is necessary to create complex finite-element models, what entails a multiple increase in the calculation time. Replacing parts of the simulation model with equivalent elements with pre-calculated parameters can significantly reduce the calculation time while maintaining the accuracy of the results. The article describes the procedure for forming the stiffness matrix of joint connection of railway bridge main truss. Comparison of the results obtained during the analysis of the complex and equivalent models is carried out. According to the results of the analysis, it was shown that the difference between the axial forces is 4.76%, while for bending moments and shear forces, the mean value of the difference does not exceed 12.07%. The average difference for the main trusses in-plane movements is 0.62%. The data obtained confirm the feasibility of using manually formed stiffness matrices in the analysis of structures.
Stiffness Matrix of Joint Connection of Railway Bridge Main Truss
Lect. Notes in Networks, Syst.
International Scientific Siberian Transport Forum ; 2021 May 11, 2021 - May 14, 2021
International Scientific Siberian Transport Forum TransSiberia - 2021 ; Chapter : 69 ; 637-646
2022-03-19
10 pages
Article/Chapter (Book)
Electronic Resource
English
Nelson river crossed by Hudson bay railway on large continuous-truss bridge
Engineering Index Backfile | 1918